you should leave it in as long as possible AND start with squeaky clean hair . Many people dont use henna properly and complain at the results...
Your hair MUST be FRESHLY washed.(shampoo ONLY NO conditioner)..towel dry and apply henna . Wrap in plastic and leave on as long as you can..minimum 2 hours I like to leave it on for 4.
The colour then takes MUCH better. Also after colouring I try not to wash my hair for 3 days....

Previously, I dyed hair with ordinary hair dye, then switched to regular henna. But this product is much better! 1 - easy application - just with your hands, don't need special brushes and combs. not sprayed and not flowing over my face. 2 - I have light brown hair with some gray. 40 minutes later I got a smooth dark brown with no gray. 3 - hair is shiny and strong!
still do not know how quickly the color will wash off, but I am very happy, I'll buy this henna again!

I was very unsure to use this product, because all of the ingredients aren't "natural".
Applying was so easy and the results.. i have never gotten such a lovely dark brown with another hair color. I received compliments daily about my hair color!

The color is dark brown for about a week, fading gradually. The hair then looks nicely and naturally striped, with dark brown color and a little lighter brown color. (I have been using this product for many months).
Whats not nice about this is that I can see the color dripping of when I rinse my hair with water after the shampooing (using the Surya Henna conditioner helps with this problem) The towel gets a little brownish too for about 2 weeks. I use a towel on my pillow at night for the same reasons. I find it more messy then the powder haircolor. Too bad that the powder haircoloring comes out too reddish.

Really good product that covers gray well, has no ammonia or some of the other very harsh chemicals, and for me, I have to leave it on for two hours to really have the dark brown color. The drawback for me is that it only lasts for two to three weeks.

im usually happy with this product but i have purchased 3 bottles now they are like water instead of cream ordered dark brown leave you red there must be a manufacturing problem with product.very unhappy

This cream henna is great for dark brown hair. It deeply conditions and has helped my hair recover from years of regular drugstore hair color. I like to alternate between the dark brown and the black. I am a med-dark brunette.